How to alter a column's data type in a PostgreSQL table?

How to alter a column's data type in a PostgreSQL table?

sql postgresql psql alter-table alter-column

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How do you use script variables in psql?

sql postgresql variables psql

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Import postgres database without roles

sql database postgresql import psql

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PostgreSQL: encoding problems on Windows when using psql command line utility

sql postgresql command-line character-encoding psql

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psql: no relations found despite existing relations

sql postgresql schema psql

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Is there a shortcut for SELECT * FROM?

sql postgresql syntax psql

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psql: FATAL: too many connections for role

sql postgresql connection psql

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